What degree of a polynomial is this -2a^3b^2+5ab^5+7b^4+8

What is the size of the matrix resulting from

An episode of a television show is 60 minutes long when it originally airs with commercials. on a dvd without commercials, the episode is only 417 minutes long. how many1-minute commercials did the episode include when it originally aired? write and solve an equation to justify your answer.

Define multiplicative inverse. give an example of a number and its multiplicative inverse.